Defined in header <functional> | ||
---|---|---|
template< class T > struct equal_to; | (until C++14) | |
template< class T = void > struct equal_to; | (since C++14) |
Function object for performing comparisons. Unless specialised, invokes operator==
on type T
.
The standard library provides a specialization of
| (since C++14) |
type | definition |
---|---|
result_type (deprecated in C++17) | bool |
first_argument_type (deprecated in C++17) | T |
second_argument_type (deprecated in C++17) | T |
operator() | checks if the arguments are equal (public member function) |
bool operator()( const T& lhs, const T& rhs ) const; | (until C++14) | |
constexpr bool operator()( const T& lhs, const T& rhs ) const; | (since C++14) |
Checks whether lhs
is equal to rhs
.
lhs, rhs | - | values to compare |
true
if lhs == rhs
, false
otherwise.
(none).
constexpr bool operator()(const T &lhs, const T &rhs) const { return lhs == rhs; } |
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